1.made all metal parts ,OEM service. 2.high precision and nice surface treat. 3 ... :cutting ,stamping,perforating, bending, welding,plating,powdercoating,assembling,5.)machine:CNC lathes,machining centers,pressing machines,drilling machines,grindingmechines, injection ... various of window and door rollers and accessories, also supply OEM metal components, plastic components. We have high quality plastic ...